5551000 has 128 divisors (see below), whose sum is σ = 16248960. Its totient is φ = 1728000.

The previous prime is 5550997. The next prime is 5551003. The reversal of 5551000 is 1555.

It is an interprime number because it is at equal distance from previous prime (5550997) and next prime (5551003).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90970 + ... + 91030.

It is an arithmetic number, because the mean of its divisors is an integer number (126945).

Almost surely, 2^5551000 is an apocalyptic number.

5551000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5551000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8124480).

5551000 is an abundant number, since it is smaller than the sum of its proper divisors (10697960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5551000 is a wasteful number, since it uses less digits than its factorization.

5551000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 5551000 is about 2356.0560264985. The cubic root of 5551000 is about 177.0613382909.

Adding to 5551000 its reverse (1555), we get a palindrome (5552555).

The spelling of 5551000 in words is "five million, five hundred fifty-one thousand".